If you obtain financing for a specific vehicle, you cannot apply that financing to a different vehicle without the lender's approval. If you want to cancel the financing, review your contract for any penalty you might have to pay to the financing company. It may be that the approval is preliminary, and all you have to do is tell the financing company "I'm no longer interested", or it may be that the dealership does not actually have approval but is trying to get you to buy the car.

